<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        table,tr,th{
            width: 100;
            font-family: 微软雅黑;
        }
    </style>
</head>
<body>
    <table border="1" style="border-collapse: collapse;">
        <tr>
            <th colspan="12">1</th>
            <th rowspan="12">&nbsp;2&nbsp;</th>
        </tr>
        <tr>
            <th rowspan="12">&nbsp;4&nbsp;</th>
            <th colspan="10">5</th>
            <th rowspan="10">&nbsp;6&nbsp;</th>
        </tr>
        <tr>
            <th rowspan="10">&nbsp;8&nbsp;</th>
            <th colspan="8">9</th>
            <th rowspan="8">10</th>
        </tr>
        <tr>
            <th rowspan="8">12</th>
            <th colspan="6">13</th>
            <th rowspan="6">14</th>
        </tr>
        <tr>
            <th rowspan="6">16</th>
            <th colspan="4">17</th>
            <th rowspan="4">18</th>
        </tr>
        <tr>
            <th rowspan="4">20</th>
            <th colspan="2">21</th>
            <th rowspan="2">22</th>
        </tr>
        <tr>
            <th rowspan="2">24</th>
            <th>25</th>
        </tr>
        <tr>
            <th colspan="2">23</th>
        </tr>
        <tr>
            <th colspan="4">19</th>
        </tr>
        <tr>
            <th colspan="6">15</th>
        </tr>
        <tr>
            <th colspan="8">11</th>
        </tr>
        <tr>
            <th colspan="10">7</th>
        </tr>
        <tr>
            <th colspan="12">3</th>
        </tr>
        
    </table>
</body>
</html>